<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 2.为echarts准备一个具备大小（宽高）的DOM -->
            <div id="main" 
            style="width: 600px;height:400px;">
            </div>

        </el-card>

    </div>
</template>
<script>
// 1、导入echarts
import * as echarts from 'echarts'
import _ from 'lodash'
export default{
    data(){
        return{
            // 需要合并数据
            options: {
                title: {
                text: '用户来源'
                },
                tooltip: {
                trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                    backgroundColor: '#E9EEF3'
                    }
                }
                },
                grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }
        }
    },
    created(){

    },
    // 此时页面上的元素，已经被渲染完毕了！
    async mounted(){
        // 3.基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));
        const {data:res} = await this.$http.get('reports/type/1')
        if(res.meta.status !== 200){
            return this.$message.error('获取折线图数据失败！')
        }
        // 4.准备数据和配置项
        const result = _.merge(res.data,this.options)
        // 5.展示数据
        myChart.setOption(result)

    },
    methods:{

    }
}
</script>

<style lang="less" scoped>

</style>
